能楽 (Nohgaku) is a traditional form of Japanese theater that combines drama, music, and dance, often conveying stories from history and mythology. It is characterized by its minimalist style, elaborate costumes, and use of masks, making it a unique cultural art form. This performance art often requires audiences to understand its subtlety and depth, which connects it to the significance of greetings in Japanese culture through formal expressions and respect shown during performances.